Finding the Fourth Proportional to 64,819.15, 89,491.71 and 52,910.80

Step by Step Solution

1. Step 1: Write the proportion equation
   64,819.15 : 89,491.71 = 52,910.80 : x
2. Step 2: Convert to fraction form
   64,819.15/89,491.71 = 52,910.80/x
3. Step 3: Cross multiply
   64,819.15x = 89,491.71 × 52,910.80
4. Step 4: Simplify right side
   64,819.15x = 4,735,077,969.47
5. Step 5: Solve for x
   x = 4,735,077,969.47/64,819.15
6. Step 6: Final answer
   x = 73,050.60